Finding the Fourth Proportional to 131.27, 196.15 and 100.25

Step by Step Solution

1. Step 1: Write the proportion equation
   131.27 : 196.15 = 100.25 : x
2. Step 2: Convert to fraction form
   131.27/196.15 = 100.25/x
3. Step 3: Cross multiply
   131.27x = 196.15 × 100.25
4. Step 4: Simplify right side
   131.27x = 19,663.54
5. Step 5: Solve for x
   x = 19,663.54/131.27
6. Step 6: Final answer
   x = 149.79